Broan Elite Custom Hood for RMP17004 or RMPE7004 Inserts 30"/Cabinet/Hood inside depth is 21" to 24" Use when the cabinet/hood inside depth is 21" to 24"Designed to work with the Broan Elite Pro-Insert, the liners feature a 3" adjustable nose to provide application flexibility, and a 4" depth for excellent captureStainless Steel construction protects custom hood base and wipes clean easily